Home / 20,685.48-30,989.08-12,226.68

Finding the Fourth Proportional to 20,685.48, 30,989.08 and 12,226.68

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Solution

The fourth proportional to 20,685.48, 30,989.08 and 12,226.68 is: 18,316.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.48 : 30,989.08 = 12,226.68 : x
  2. Step 2: Convert to fraction form
    20,685.48/30,989.08 = 12,226.68/x
  3. Step 3: Cross multiply
    20,685.48x = 30,989.08 × 12,226.68
  4. Step 4: Simplify right side
    20,685.48x = 378,893,564.65
  5. Step 5: Solve for x
    x = 378,893,564.65/20,685.48
  6. Step 6: Final answer
    x = 18,316.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.